Kad udjem podesevanja, i izaberem Chat, izbaci mi Registration failed..
I meni je istu poruku izbacivao kada kliknem na Chat Settings, a kako bi to u nasim novinama rekli, jedna stvar je resila problem
In the play store I installed Carrier Services (from Google) and Google Messages.
Open Google Messages, set it as default messaging app.
Went to settings > Chat Features
to enable the new RCS chat. You will get a pop-up asking you to to enable RCS (you will have to give them your number, but its google, they already have it)
You may have to wait a bit for it to verify.
Once verified you jump back over into Samsung Messages, set it as the default messaging app
(should prompt you), then go to settings > chat settings
. It should let you in right away, then you can either keep the RCS chat on or turn it off.
You can now uninstall both Carrier services and Google Messaging.